CVE-2026-53071

Summary

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: l2cap: Add missing chan lock in l2cap_ecred_reconf_rsp

l2cap_ecred_reconf_rsp() calls l2cap_chan_del() without holding l2cap_chan_lock(). Every other l2cap_chan_del() caller in the file acquires the lock first. A remote BLE device can send a crafted L2CAP ECRED reconfiguration response to corrupt the channel list while another thread is iterating it.

Add l2cap_chan_hold() and l2cap_chan_lock() before l2cap_chan_del(), and l2cap_chan_unlock() and l2cap_chan_put() after, matching the pattern used in l2cap_ecred_conn_rsp() and l2cap_conn_del().

Affected Software

Weaknesses

ADP Enrichment

kernel: Bluetooth: l2cap: Add missing chan lock in l2cap_ecred_reconf_rsp

Additional References

• https://access.redhat.com/security/cve/CVE-2026-53071
• https://bugzilla.redhat.com/show_bug.cgi?id=2492458
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53071.json

References

• https://git.kernel.org/stable/c/96dca51715d86559ed6ed8028e5445cecb80f3ae
• https://git.kernel.org/stable/c/330b20ec97916961ee0e6c29c06bc0fa7c96e64c
• https://git.kernel.org/stable/c/0ccd75c51f620374086f359e906917676e699a1c
• https://git.kernel.org/stable/c/77a853aec710b2fdf41fa298ea3cbc9a4358f917
• https://git.kernel.org/stable/c/fe1188abdae9b7a8199dcdfcf9244d5e5d61eb14
• https://git.kernel.org/stable/c/dc89961b76f12aff47124c1df4bdb32a080f4d0c
• https://git.kernel.org/stable/c/5501d055a1ce3c747141e3955ba8cf034d193f3e
• https://git.kernel.org/stable/c/42776497cdbc9a665b384a6dcb85f0d4bd927eab

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